nominal pass-band center frequency

nominal pass-band center frequency

[′näm·ə·nəl ′pas ‚band ¦sen·tər ′frē·kwən·sē]
(engineering)
The geometric mean of the nominal upper and lower cutoff frequencies of an acoustic or electric filter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.